Human rights activist Ou Virak says the organization lack the authority to summon anyone for questioning, unlike the government.
She has nine brothers and sisters, her parents and an aging grandmother—and few opportunities to help support them.
The rights group Licadho estimates there are 742 juveniles, including 29 girls, in the national prison system.
It is celebrated worldwide every Dec. 10 as Human Rights Day.
But a government committee said the bridge disaster was not the fault of any body or agency.
Ou Virak, president of the center, said the victims have the right “to find out the facts” of the incident.
Some 2,700 people from 14 provinces contributed corruption complaints earlier this year.
In a joint statement by 66 NGOs last week, groups said they wanted to contribute meaningful input to the draft law.
Chea Vichea, a widely popular labor leader, was shot to death in February 2004.
A leading Khmer Rouge tribunal monitor said Monday he was optimistic about the UN-backed court.
Suu Kyi was released on Saturday, imprisoned or under house arrest for most of the last 20 years.